[GitHub] [incubator-zipkin] anuraaga commented on a change in pull request #2582: Reuse char[] buffer when decoding hex fields.

[GitBox <gi...@apache.org>]

anuraaga commented on a change in pull request #2582: Reuse char[] buffer when decoding hex fields.
URL: https://github.com/apache/incubator-zipkin/pull/2582#discussion_r283085319
 
 

 ##########
 File path: zipkin/src/main/java/zipkin2/internal/Proto3Fields.java
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 @@ -190,15 +197,21 @@ static int decodeLowerHex(char c) {
 
     @Override String readValue(Buffer buffer, int length) {
       length *= 2;
-      char[] result = new char[length];
+
+      // All our hex fields are at most 32 characters.
+      if (length > 32) {
 
 Review comment:
   Since the data comes over the wire, it's possible a bad client or something would send bad data. I think we would generally want a runtime check for incoming data which wouldn't be a local programming bug. What do you think?

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